Very scarce in all grades, R4.0.
David Akers: In circulated conditions, and in mint state grades below Gem quality, the 1900 is not especially difficult to locate. However, accurately graded Gems are very rare and this issue is certainly undeserving of its traditional common date status. In fact, in Gem condition, the 1900 is actually every bit as rare as many of the more highly regarded issues in this series, including some in the 1890's.
David Akers - Dr. & Mrs. Steven L. Duckor Barber Half Dollar Collection - Heritage 8/2010:3197 - Greensboro Collection, Part VI - Heritage 10/2015:3289, $19,975